Across
- 4. A force that opposes the motion of an object (7 letters)
- 6. The natural satellite that orbits the Earth (4 letters)
- 8. A device used to measure temperature (12 letters)
- 9. The planet we live on (5 letters)
- 10. The force that pulls objects toward the center of the Earth (8 letters)
Down
- 1. The process by which plants make their own food using sunlight (14 letters)
- 2. The smallest unit of matter (4 letters)
- 3. A substance that cannot be broken down into simpler substances by chemical means (7 letters)
- 5. The gas that we breathe in to survive (6 letters)
- 7. A solid, natural substance made of minerals (4 letters)